Abstract
Maghemite (γ-Fe 2 O 3 ) nanoparticles have been synthesized using a chemical co-precipitation method. The morphology and particle size is characterized using Transmission Electron Microscopy (TEM), and magnetic characterization using Alternating Gradient Magnetometry (AGM). The stability of the maghemite nanoparticles suspension were studied at different pH and time of storage. Dynamic Light Scattering (DLS) and Zeta Potential were conducted to determine the stability of the suspensions. TEM observation showed that the particles size is 9.6 nm and have spherical morphology. The particles showed superparamagnetic behavior with saturation magnetization 25.5 emu/g. The suspensions are stable in the acidic condition at pH 4 and alkaline condition at pH 10. The suspensions remain stable after 4 weeks of storage.
Highlights
Maghemite nanoparticles is a magnetic materials which have been widely interest of researchers due to their unique characteristics
Transmission Electron Microscopy (TEM) observations and image analysis show that the maghemite nanoparticles have spherical morphology and 9.6 nm particle size
Magnetization curve show that maghemite nanoparticles exhibit superparamagnetic behavior
Summary
Maghemite nanoparticles is a magnetic materials which have been widely interest of researchers due to their unique characteristics. They generate a new class of liquids called “magnetic fluids” in the solvent. The unique of these smart materials is because they have superparamagnetic behavior and biocompability. They used in wide range application including electronic, mechanical engineering, aerospace, environmental, and bioengineering [1,2,3]. The magnetic fluids can be used effectively in thermal engineering applications [4]
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